I guess that's OK if you don't care about the phone getting wet when you actually want to USE it. The primary reason I carry a cell phone on board is so I have communication in case of emergency, so I wouldn't want to have to be concerned about keeping the phone dry in that situation.

I use an Aquapac and generally either stick the phone in a tramp pouch or hang it from my neck, tucked under my wetsuit. It works fine with the iPhone touch screen and can even take half decent pictures through the case. Relatively cheap too, around $25.

I got myself one of these:http://www.rei.com/gear/feature/search/ ... 15192735:skeeps the phone dry and plays whatever music is on the phone at the same time. great for sailing. fair warning, i'm on my 3rd one, the other two stopped working, thank god for warranties. I would recommend getting a less cheap version of this.

newest one has held up the best, it is slightly different than what is pictured in that link/my first two(latches and logo are different)

Lifeproof.com has waterproof iPhone covers. Good to 6" depth if you drop it in the water. Also have snap-on feature so you can attach it to your belt or PFD for easy access. Use ours for fast, spray-in-your-face AI sailing. Sure beats bagging the phone in a water-tight container and then trying to keep it dry while using it. They're a bit pricey but way cheaper than my iPhone and/or handheld VHF radio.

I really like the idea of the VHF radio blue tooth connection to the cell. VHF is much more useful when sailing where there is no cell connection. With a BT connection to the phone... really interesting.

I have a dry bag for the cellphone. In a separate small ziplock bag, I store my Bluetooth headphone. Head phone gets tucked into lifejacket pocket. Need to make a call? Get out headset and use voice dialing to place call. Phone stays in it's happy place.

I just found an old OtterBox #1900 that my wife bought me years ago for my Palm Pilot. The iPhone 5 (and smaller) fits in there perfectly, and there's a thin membrane on the front so I can operate the touch screen. I doubt it would be very good for talking, but it's great for using the screen for things like map/GPS and of course you could text. It's large enough that it will float, also.

The back is solid, so you can't use the rear camera. On the iPhone 5 there isn't enough room to use the front camera either (and still reach the front button well), but with the 4 it works well.

This is definitely going to be part of my sailing kit from now on. I don't go out on the boat so I can yak on the phone, but having screen access (and maybe a camera) is great.

Another thing I've learned over the years is that when you have electronics in a waterproof bag or case, always stuff a paper towel or similar in with it so the odd drop of water that finds its way in there doesn't pool in one corner where it will invariably wick into some important electronic circuit.